the other one will. it is heartbreaking. victims have beenidentified.krystlecampbellwasone of those killed. her mother paid tribute to her. >> i cannot leave this has happened. she was such a hard worker in everything she did. >> boston is a city that mourns for its dead. tomorrow, president obama comes to sharon agreed, and to reassure a nation shaken by the attacks on the marathon. >> a busy day in the investigation where we do seem to have fixed the sound problems that we have with boston. lord trevelyan is there. we have been getting conflicting reports -- laura trevelyan is there. we have been getting conflicting reports. describe for us what we know and what we do not know. time, thereoint in are two things we know. boston police and the fbi have said that no arrests have been made in connection with this case. and we also understand that a press conference with information from the police and the fbi was do about half an hour ago, but was postponed. that is due this evening. those are the two things we know. the rest of the realm of speculation and contradictory informa

-year-oldkrystlecampbellandlu lingzi, a chinese graduate student at boston university. last night, neighbors and friends of martin richard and his family held a candlelight vigil near a baseball diamond and field where he used to play. >> everybody knows them, everybody loves them. it's just unthinkable, you know, anybody's little boy, was our little boy. >> reporter: boston common was the site of another vigil last night. several hundred turned out to sing and pay tribute to those killed, and the more than 170 injured. >> bostonians and people who are here are resilient and we come together in the hardest times and the best times so you know it's still great to be a bostonian. >> reporter: and in washington today, secretary of state john kerry, who also calls boston home, spoke emotionally at a congressional hearing. >> the granddaughter of a very, very close supporter and friend of mine through all my political career is fighting to keep both of her legs. boston is not going to be intimidated by this. but we're going to find out who did this. >> reporter: many of the injured, wh